Process of manufacturing radiators.



No. 858,258. PATENTED JUNE 25, 1907. F. BRISGOE & J. M. ANGUISH. PROCESSOF MANUFACTURING RADIATORS.

APPLICATION FILED SEPT. 28, 1906.

2 SHERTSQKEET 1,

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C 4 ngllz? N0. 858,258. PATENTED JUNE 25, 1907. F. BRISCOE & J. M.ANGUISH.

PROCESS OF MANUFACTURING RADIATORS. APPLICATION FILED snrr. 2a, 1906.

2 SHEETS-SHEET 2.

5%96. gyg'gz have as much as .in order to be cooled, andoflniaterial-andweight. T

UNITED STATES FRANK BRISCOE AND JAMES" M. C'ANGUISH,

ASSIGNORS TO BRISCOE A CORPORATION OF PATENT OFFICE.

or DETROIT, MICHIGAN,

MFG. COMPANY, OF DETROIT, MICHIGAN, MICHIGAN.

PROCESS OF MANUFACTURING HIADIATO'RS.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed September 28, 1906. serial No- 836,627.

To in whom it may concern: Be it known that we, FRANK BmscoE and JAMESM. ANGUIsH, citizens of the Uniteddiators used for cooling liquid-cooledexplosive motors in automobiles and similar vehi cles. Radiators of thisclass consist in general of tubes through which the water flows fins orgills pro jecting from the tubes for dissipating the heat therefrom. Theefiiciency of the fin is greatl increased by making a continuous metalic connection between it and the tube, which connection is done bysoldering. In order to provide an ample connection a flange is thrown uparoundthe aperture-through which the tube passes, and it is desirable topossible of, the surface of this flange soldered to the tube.This-soldering has usually been accomplished inone of three differentways, to-wit: First, solderin by hand; second, dippin the assembled tubeand fins into molten sol er; or third, by

first tinning the tube or fin, or both, then assemblin and then heatingthe assembled parts W ich causes afusion of the tin sufficient'toproduce contact of arts. The objection to the first mentione method isthat it requires conslderable labor and is, hence,

too-expensive. The second method requires angexcessive amount of themolten. solder whichinecessarily adds bot to the amount I e third methodproduces poor contact.

Broadly speaking, the object of our invention i'sto rovide means wherebygood contact may e obtainedwith a minimum expenditure of laborandminimum quantity of solder or other fusing mater al. The specificmethod will be hereinafter described.

Generally speaking, we accomplish our ob-' ject by perforatin the finsat one or more points, such that w en the fins are assembled uponthetubes these small apertures willlregi'ster with'each other, that1s,'form a line or row of apertures at, or near the side of the tubewhen viewed in the direction of the 14 represents tubes t ;howeveris amere matte lengthof the tube. Into these registering small apertures isthreaded a wire of solder or similar fusible material and the wholestructure is then heated sufliciently to cause the fusing of the solder,which flows into the joints between thefin-flanges and theexterior'surface of the water tube, thus forming a metallic bond orconnection between the fin and the tube/ The process will be referringto the drawings in which Figure l is a erspective view of a portion of aradiator s owlng the fins in position uponthe tubes before the solderhas beeninserted. Fig. 2 is similar to Fig. 1 except better understoodby that the fusible wire of solder or other similar material is shown inposition within the assembled parts. Fig. 3 is a fragmentary perspectiveView showing the rear face of the fin with the contact flange thereof.In this form the solder aperture is clear cut, that is, cut away. sothat there is no borderin flange around the said solder aperture. v.ig.4 is similar to Fig. 3 but illustrates a modification in that a'flangeis present around the solder aperture. Fig. 5 is a sectional view takenon line 55, Fig. 4. Figs. 6, 7 and 8 are sectional views, taken" on line6-6, Fig- 9. Fig.

6 lllustrates respectively the tube and fin, as-

sembled but rior to the insertion of the solder wirei Fig. 7 shows thesolder wire in position ready for fusing, and Fig. 8 shows the partsafter fusion. Fig. 9 is a plan view of a portion of the radiatorshowing, fusionanges in position upon the water tube. Figs. 10, 11 and12 are face views of various shapes of fins.

Similar numerals refer to similar parts throughout the several views.

Referring first to the form of device shown in Figs. 1 to 3'inclusive,and v6 to 9 inclusive,

ough which the-water or other-liquid to be fl0ws.' For convenience ofdescription they will be referred to as. Water .tubes. In the formillustrated the width is considerably greaterthanthe height and-theyhave parallel top and bottom and. rOundgedendsu This,

invention applieselel%ually. cross-sectional ice guratreni; of thefin,.-which?-w ll forconvenience be recooled or condensed desi n, the

to-tubes of-any On; one face ferred to as back. or rear face, arethrownup water tubes as.closely as possible.

flanges 16 which are designed to touch the These flanges are integralwith the fins and are formed by stamping in the manner well knownin theart.

At one or more points in the fins at or near the opening for the tubeare formed the solder-wire apertures 17. These apertures are located atthe same relative point in each one of the fins with the result thatwhen the fins are strung upon the tubes these aper tures register, thatis, are in line with each other when viewed in the direction of thelength of the tube. These apertures 17 may be clear cut at the edges asshown in Fig. 3, that is, with no flanges bordering said solderapertures, or they may have such bordering flanges as illustrated inFigs. 4 and 5. There are as many of these apertures 17 in each fin ateach tube as are required for thefurnishing of sufficient solder, andconsidering the dis-' tance which the solder will flow, but for the sakeof example, it may be stated that we have found by experiment that in aradiator wherein the tubes are approximately of the cross-sectionaldimensions of 1/4 x 1" a single solder aperture on each side of the tubeis suflicient. This, however, may be varied, depending upon the size ofthe solder wire employed, its fusibility and the space interveningbetween the tube and the flange 16.

After the tube and fins have beenassembled in the manner above describedwith the apertures 17 re istering with each other, a wire or bar 19 osolder or other similar fusible material is threaded through the seriesof apertures along the tube. When the parts are all thus assembled thesolder is heated to melting point by any one of three methods to-wit:First, the assembled parts may be subjected to a flame or other externalsource of heat second, a hot mandrel may be inserted into the tubes.Third, the assembled tubes, fins and wires may beplaced within afurnace. It will be understood that previous to the assembling of thetubes and fins they have been prepared by a process commonly known aspickling for receiving and becoming fused with thesolder. As a result ofany one of the three above mentioned heating processes the solderingmaterial is sweated uniformly between the flange and the tube and formsan excellent metallic contact or bond between them. The melted solderreadily flows into the space between the flanges 16 and the tubes 14 sothat when the'parts are subsequently cooled the tubes and fins are toall intents and purposes integralwith each other. It has been found byexperiment that the solder flows almost entirely to the spaces betweenthe aforesaid tubes and flanges where it performs its proper functioninstead of being wasted upon the surface of the tubes at points remotefrom the fins and flanges thereof.

The preferred method of heating the parts is by placing them in afurnace and it is obvious that our process is expeditious and economlcalof labor, as well as economical of material, and efficacious. Theresulting product has minimum weight because not burdened with excessiveand useless solder and the tubes and fins being thus free from uselesssolder, have maximum radiating power.

The result of the operation is practically the same whether theapertures 17 are clear cut as shown inFig. 3 or flange-bordered as shownin Fig. 4.

It is probably unnecessary to state that the shape of the finsthemselves is quite immaterial so far as the spirit of our invention isconcerned, and the flanges may with equal results be a parallelogram, asshown in Fig. 10, square, as shown in Fig. 11, or round as shown in Fig.12. In Fig. 12 the fin is shown to have a single solder aperture whilein the other figures there are shown to be two of these apertures onopposite sides of the tube. In Figs. 10, 11 and 12 the tube receivingapertures are shown to be round for receiving cylindrical tubes, theshape of the tube being also immaterial in so far as the spirit of ourinvention is concerned.

What we claim as new and desire to secure by Letters Patent, is:

1. The process of manufacturing radiators and similar cooling devicescomprising tubes and fins thereon, said process consisting inperforating the fins at the tubes, threading a filament of solderthrough the perforations in said fins, and subjecting the solderfilament to melting heat while said filament is in place.

2. The process of manufacturing radiators and similar cooling devicescomprising tubes and flanged fins fitting over them, said processconsisting in perforating the fins and flanges at the tube apertures,assembling the fins on the tubes, threading a filament of solder throughthe perforations in said fins and subjecting the whole structure to atemperature sufficient to melt the solder.

3. The process of manufacturing radiators and similar cooling devicescomprising tubes and flanged fins fitting over them, said processconsisting of perforating the fins and IIO flanges at the tubeapertures, stringing the FRANKIBRISCOE. JAMES M. Aneui n.

Witnesses.

PAUL R. McKENNEY, JAMES A. HOLIHAN.

